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Oriskany Sandstone and Huntersville Chert (WVDo;0)

Geologic Formation in WV, VA, MD

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Lithology

Limestone

Sandstone

Chert

Geologic Age

Devonian (422.4 Ma – 359.3 Ma ago)

Geologic Unit Label

Oriskany Sandstone: sometimes designated Ridgeley in eastern West Virginia. White to brown coarse- to fine-grained, partly calcareous sandstone, locally pebbly or conglomeratic, and ridge-forming. May be white, nearly pure silica, and a source of glass sand, as at Berkeley Springs, Morgan County. Huntersville Chert (part of Onesquethaw (“Onondaga”) Group): ranges from a nearly pure slightly calcitic or dolomitic chert to an inter-tonguing of such chert and the Needmore Shale. Grades westward in the subsurface to a limestone, commonly considered as “Onondaga”. Contains the “glauconitic” Bobs Ridge Sandstone Member. Not mappable at scale of this map. Included with Do.

— USGS

Taxonomy

Classified As

Geologic Formation